DE53440C

DE53440C - Crank gear with double and returning rotating crank loop

Info

Publication number: DE53440C
Application number: DENDAT53440D
Authority: DE
Original assignee: O. F. A. jörgensen in Helsingfors, Finnland
Anticipated expiration: 1909-07-24

Description

KAISERLICHESIMPERIAL

PATENTAMT.PATENT OFFICE.

PATENTSCHRIFTPATENT LETTERING

KLASSE ΑΠ: Maschinenelemente.CLASS ΑΠ: machine elements.

Patentirt im Deutschen Reiche vom 24. Juli 1889 ab.Patented in the German Empire on July 24, 1889.

In'Fig. ι und 2 ist A die Kurbelwelle, B ihr Lager, C ein lose auf die Welle A gesteckter Kurbelarm, D der an C befestigte Kurbelzapfen, E eine am Lager B befestigte excentrische Scheibe, deren Ring F zwei entgegengesetzt gerichtete Arme G G^l trägt, welche verschiebbar in den in C und P drehbar gelagerten Zapfen HH¹ geführt sind. Die Kurbel P ist fest mit der Welle A verbunden, so dafs C und P dieselbe Drehachse haben. Die Theile ACHG bilden also die eine und E G¹ H¹ I die andere umlaufende Kurbelschleife, und letztere kehrt zur Drehachse der ersteren zurück (s. Fig. 3 bis 6).In 'Fig. ι and 2 is A the crankshaft, B its bearing, C a crank arm loosely attached to the shaft A , D the crank pin attached to C, E an eccentric disk attached to the bearing B , the ring F of which carries two oppositely directed arms GG ^{l, which} are slidably guided in the pivot HH ¹ rotatably mounted in C and P. The crank P is firmly connected to the shaft A so that C and P have the same axis of rotation. The parts ACHG thus form one and EG ¹ H ¹ I the other revolving crank loop, and the latter returns to the axis of rotation of the former (see Figs. 3 to 6).

Steht die Verlängerung I der Kurbel P nach oben, Fig. 3, so hat die treibende Kurbel C mit dem Zapfen D schon eine Voreilung d in der Pfeilrichtung. Nach einer Vierteldrehung, Fig, 4, decken ICG einander, C hat sich also mit geringerer Geschwindigkeit als / bewegt. Nach einer weiteren Vierteldrehung der verlängerten Kurbel 7, Fig. 5, hat C die Nacheilung d; die geringere Geschwindigkeit von C hat also noch angedauert. Nach einer nochmaligen Vierteldrehung, Fig. 6, decken ICG einander abermals, C hat also begonnen, seine Umdrehungsgeschwindigkeit gegen die von / zu beschleunigen. Diese gröfsere Umlaufsgeschwindigkeit von C dauert auch in der letzten Vierteldrehung fort, indem bei Fig. 3 der Kurbelarm C wieder um & vorgeeilt ist. Diese gröfsere Geschwindigkeit von C in der letzten Hälfte der Umdrehung steht in genauem Verhältnifs zu der in der ersten Hälfte der Umdrehung stattgehabten langsameren Bewegung. Der Kurbelzapfen D geht also während der ersten halben Rechtsdrehung, Fig. 3 bis 5, langsamer und während der letzten halben Umdrehung, Fig. 5, 6 und 3, schneller herum als die Welle A. If the extension I of the crank P is upward, FIG. 3, the driving crank C with the pin D already has an advance d in the direction of the arrow. After a quarter turn, Fig. 4, the ICGs are aligned , so C has moved at a slower speed than /. After a further quarter turn of the elongated crank 7, FIG. 5, C has the lag d; so the slower speed of C continued. After another quarter turn, FIG. 6, ICG again cover each other, so C has started to accelerate its speed of rotation against that of /. This higher rotational speed of C also continues in the last quarter turn, in that in FIG. 3 the crank arm C has again advanced by &. This greater speed of C in the last half of the revolution is in exact proportion to the slower movement which took place in the first half of the revolution. The crank pin D therefore goes around more slowly during the first half clockwise rotation, Fig. 3 to 5, and faster during the last half turn, Fig. 5, 6 and 3, than the shaft A.

Ist das Kurbelgetriebe für ein Fahrrad bestimmt, so wird die excentrische Scheibe E wie gezeichnet eingestellt, so dafs das Treten während der verlangsamten Kurbelbewegung stattfindet. Die beiden Fahrradkurbeln kommen während einer Umdrehung zweimal in die gewöhnliche einander entgegengesetzte Ruhestellung, Fig. 4 und 6, stehen aber nie in derselben Ebene beim Durchgang durch den todten Punkt, sondern bilden einen Winkel, so dafs die eine Kurbel der anderen über den todten Punkt hilft.If the crank mechanism is intended for a bicycle, the eccentric disk E is adjusted as shown so that pedaling takes place during the slowed crank movement. The two bicycle cranks come twice during one revolution in the usual opposite rest position, Fig. 4 and 6, but are never in the same plane when passing through the dead point, but form an angle so that one crank of the other over the dead point helps.

Bei einer doppelt wirkenden Kurbel, beispielsweise einer Dampfmaschinenkurbel oder einer mittelst eines um seine Mitte drehbaren Trittes bewegten Kurbel (Nähmaschinenkurbel), mufs das Kurbelgetriebe gegenüber der eben beschriebenen einfachen Tretkurbel eine Veränderung erfahren, weil sonst das während einer halben Umdrehung Gewonnene in der nächsten halben Umdrehung wieder verloren gehen würde. Dies wird dadurch vermieden, dafs man in diesem Falle auch die excentrische Scheibe, und zwar entgegengesetzt der Kurbel umlaufen läfst. Fig. 8 zeigt dieses Kurbelgetriebe, Fig. 7, 9, 10 und 11 sind Einzelheiten, und Fig. 12 bis 20 stellen die Bewegung der Kurbel dar.With a double-acting crank, for example a steam engine crank or a crank (sewing machine crank) moved by means of a step that can be rotated around its center, The crank mechanism needs a change compared to the simple crank just described experience, because otherwise what was gained during half a revolution is lost again in the next half revolution would go. This is avoided by also using the eccentric in this case Disc, in the opposite direction to the crank. Fig. 8 shows this crank mechanism, Figs. 7, 9, 10 and 11 are details, and Figures 12-20 illustrate the movement of the crank.

Die Dreh- und Gleitstücke HH¹ sind hier durch eine andere Einrichtung ersetzt, Fig. 7 und 8. Die Kurbel P hat ein Loch, in welches ein Zapfen α eingeschraubt ist, gegen denThe rotating and sliding pieces HH ¹ are replaced here by another device, FIGS. 7 and 8. The crank P has a hole into which a pin α is screwed against the

Claims

a second rotatable pin δ, Fig. 10, is supported, which is split in its upper part to accommodate the arm G1. The pin b rests in turn in a ring c, which is provided with two cutouts and is attached to 71. The same device is attached to C and G. The arm C is provided with a hub which serves to receive the eccentric disk E, which is formed on one side to form a bevel gear d. This is in engagement with the fixed bevel gear e and the latter with the bevel gear f. The wheel f is fixed on the shaft A, so that the wheel d must turn in the opposite direction to A. The bevel gears f and d are of equal size. The crank C D is operated by a horizontally acting connecting rod (steam engine connecting rod) in the direction of the arrow, FIGS. 12 to 20. FIGS. 12 to 14 illustrate the first quarter turn, at the beginning of which, FIGS. 9 and 12, C is before 7. At the end of the same, FIG. 14, however, C is behind 7, and has therefore moved more slowly than / during this time. With a further quarter turn, FIGS. 14 to 16, C rotates faster than /, so that at the end of this time C is present. Again after a quarter turn, FIGS. 16 to 18, C rotates at a slower speed than /, and during the following last quarter turn, FIGS. 18, 19 and 12, the rotational speed of C is again greater than that of /. In Fig. 20 the whole process is summarized during one revolution. From ν to χ the peripheral speed of the driving crank is smaller than that of the driven shaft, from χ b \ sy larger, from y to \ smaller and from \ to ν larger again. Between χ and γ respectively. ^ and ν the crank goes through the dead points, in the rest of the time at the greatest moment of application of the force the crank speed slows down, so that the piston movement is more uniform than with the usual crank mechanism. Patenτ claims:

1. A crank gear with double and returning rotating crank loop, consisting of the crank CD loose on the shaft A to be driven, which receives the driving force at D and transmits it to a double arm GG ¹ , which is rotatable on a fixed eccentric disk E , so that the Rotation of GG ^! the crank arm P of the shaft A is communicated, the crank arms C and 7 ^{1 being} connected to the double arm GG ¹ by intermediate pieces H and H ¹ , which slide on GG ¹ and rotate in C and 7 ^1.

2. Replacement of fixed eccentric disk E by a rotatable, d is connected to the bevel gear eccentric disc E, Fig. 8, the rotation means on fixed bearing axis rotatable intermediate gear e of the driven shaft A from takes place f through the bevel gear, for the purpose of the to make the crank mechanism marked under 1. into a double-acting one.

For this purpose ι sheet of drawings.